Showing papers in "Earth and Planetary Science Letters in 2021"

TL;DR: In this article, the authors conducted a comprehensive study of the regional and global settings, geomorphology, composition, mineralogy, and chronology of the Em4 mare basalts.

TL;DR: In this article, a detailed geologic map and stratigraphic assessment of the landing site of the Chang'e-5 mission is presented, which is used for the analysis and interpretation of the returned samples and in-situ measurements of the regolith substructure.

TL;DR: In this article, the authors show that the absence of a complete long-lived contemporaneous subduction girdle around Gondwana likely prevented its breakup, in contrast to Rodinia and Pangea, in which the presence of subduction geirdles corresponds with lithospheric extension across the supercontinents as a precursor to their ultimate breakup.

TL;DR: In this article, a land surface model adapted for permafrost simulation is employed to quantitatively investigate the impacts of climate warming and wetting on thermal regimes by setting up a group of hypothetical numerical scenarios on the basis of historical meteorological records.

TL;DR: In this article, the authors calculated receiver functions using teleseismic waveforms recorded by a dense nodal seismic array crossing from the Longxi basin of northeastern Tibet across a transition zone marked by the Liupan Shan (mountains) into the Ordos block.

TL;DR: In this paper, the authors reveal the detailed burial and exhumation processes that formed granulitized eclogites in the Everest east region, central Himalaya, so as to explore the tectonic regimes recorded by similar rocks on early Earth.

TL;DR: In this paper, the authors use a numerical model to constrain the controls on basaltic eruption style, using Kilauea and Etna as case studies, and propose that lava fountaining is a distinct style, separate from effusive and explosive eruption styles, that is produced when magma ascends rapidly and fragments above the vent, rather than within the conduit.

TL;DR: In this article, the authors present results from micrometeorite collections originating from the vicinity of the CONCORDIA Station located at Dome C (Antarctica), where they performed several independent melts of large volumes of ultra-clean snow.

TL;DR: In this article, the authors present frontal ablation and ice mass change for 38 major calving glaciers in the Patagonian icefields based on remote-sensing observations of ice-front positions, surface speeds and elevation changes.

TL;DR: In this paper, the authors use data collected by 39 ocean bottom seismometers deployed near the equatorial mid-Atlantic Ridge on 0 to 80 Myr old seafloor to infer thin and slightly thicker melt channels and punctuated regions of ascending partial melt.

TL;DR: In this article, a detailed petrological and geochemical description of the erupted lavas sampled by the MAYOBS 1, 2, and 4 cruises between May and July 2019 is presented.

TL;DR: In this article, a simple sample-based analysis of the global detrital-zircon record is proposed to track the emergence of continental-crust throughout Earth's history.

TL;DR: In this paper, a detailed model of the crust and upper mantle under Iceland and the surrounding North Atlantic region was computed using seismic waveform tomography with massive datasets, revealing a large, low-velocity anomaly, indicative of high temperatures, at 400-660 kilometers depth beneath eastern Greenland, where seismic receiver functions also indicate an extensive high-temperature region.

TL;DR: Wang et al. as discussed by the authors showed that the δ 18 Op signals preserved in precipitation are consistent with those in ice cores, both in the non-monsoon and monsoon regions.

TL;DR: In this paper, a series of velocity-stepping experiments on powdered samples (to simulate fault gouge) while systematically varying the porefluid pressure and effective normal stress conditions were performed.

TL;DR: In this paper, Δ47 values indicate precipitation temperatures below ∼90°C, in agreement with fluid inclusion analyses, suggesting a local source that has interacted with the host rock, or negative, suggesting the downward incursion of meteoric waters.

TL;DR: In this article, a joint inversion of teleseismic P and SH waves and static displacements from regional GPS stations is used to determine the space-time slip distribution of the Shumagin gap.

TL;DR: Using U-series dating and stable isotope analysis on five stalagmites from Magou Cave, Henan Province, Central China, this paper constructed a high-resolution and precisely dated composite stalagmite δ 18 O time series covering most of the Holocene.

TL;DR: In this paper, the authors present new palaeointensities from 6 dykes from the western end of the Grenville Dyke swarm that recorded directionally anomalous geomagnetic fields around ∼585 Ma.

TL;DR: In this paper, a disordered kinetic framework is proposed for carbonate clumped isotopes (C-O) to model first-order processes occurring in parallel at different rates, and the authors show theoretically that all previous models are specific cases of disordered kinetics.

TL;DR: In this paper, the effect of hydrogen on the elastic properties of iron and iron-silicon alloys using ab initio molecular dynamic simulations was investigated and it was shown that these H-bearing alloys maintain a superionic state under inner core conditions and their shear moduli exhibit a strong shear softening due to the superionic effect, with a corresponding reduction in V S.

TL;DR: The expansion of land plants is considered to have played a key role in triggering the Late Paleozoic Ice Age (LPIA), but evidence linking climatic events to terrestrial floral changes is limited as mentioned in this paper.

TL;DR: In this paper, the authors investigated the elastic properties and velocities of hydrous ringwoodite at high pressure and temperature conditions using first-principles calculations and concluded that about 80% of the water concentration in the lower MTZ likely decreases with depth globally and the whole MTZ contains about one ocean mass of water.

TL;DR: In this article, 3D magnetotelluric resistivity models of the Archean Superior Province reveal the presence of low resistivity zones in the mid-lower crust that reflect a protracted history of magmatic-hydrothermal activity contemporaneous with construction and collapse.

TL;DR: In this article, the authors presented the analysis and interpretation of the data collected during the first twenty lunar days, from January 2019 to July 2020, from the Yutu-2 rover, part of the Chang'e-4 (CE-4) mission to the lunar farside.

TL;DR: In particular, the impact of hydrodynamic processes on the age, abundance, and stable isotopic composition of sedimentary organic carbon (OC) burial is poorly constrained as discussed by the authors.

TL;DR: In this article, the authors combine a quantitative synthesis of the ophiolitic record of the Neotethys subduction in the Late Cretaceous with 3D spherical modeling of mantle convection self-generating plate-like tectonics to propose that the pre-Deccan plume initiated the Southern Neotithys Subduction.

TL;DR: In this paper, the authors show that infrasound signals, detected at distant ground-based stations, can be used to generate a map of the acoustic intensity, which is proportional to the shaking intensity.

TL;DR: In this paper, detrital zircon U-Pb and Hf-isotope data from forearc units in northern Honshu, Japan that span in age from the Silurian Period to the present from the forearc provenance of the Japanese subduction system were used to evaluate the degree of continental reworking that occurs in the arc system.